Home / 129,516.97-178,729.47-72,156.27

Finding the Fourth Proportional to 129,516.97, 178,729.47 and 72,156.27

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Solution

The fourth proportional to 129,516.97, 178,729.47 and 72,156.27 is: 99,573.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,516.97 : 178,729.47 = 72,156.27 : x
  2. Step 2: Convert to fraction form
    129,516.97/178,729.47 = 72,156.27/x
  3. Step 3: Cross multiply
    129,516.97x = 178,729.47 × 72,156.27
  4. Step 4: Simplify right side
    129,516.97x = 12,896,451,894.28
  5. Step 5: Solve for x
    x = 12,896,451,894.28/129,516.97
  6. Step 6: Final answer
    x = 99,573.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.